The H-23 turns-counting dial can be used in conjunction with a multiturn potentiometer
to count the number of turns of a pot, giving the user the ability to fine-tune the potentiometer.
An external offset adjust is provided through a long-life multiturn potentiometer
to provide up to [+ or -]400 mV of DC offset to the analog log video output.
Readings are performed by a DIP-switch array for the coarse range setting, and two multiturn potentiometers
are used for the final fine-tuning.